Sinergy Flow

Sinergy Flow develops low-cost, sustainable redox flow batteries for long-duration energy storage (exceeding 10 hours) based on earth-abundant materials, enabling renewable energy penetration of up to 90%. The company's battery technology exploits sulfur—a byproduct of the petrochemical industry—as a key material, making the supply chain free from geopolitical oligopolies and fully compliant with Circular Economy principles. The modular and scalable design features a customizable energy-to-power ratio (E/P), making it suitable for multi-day energy storage applications that support grid stability, energy communities, and distributed renewable energy projects. By addressing the critical cost and sustainability barriers in long-duration energy storage, Sinergy Flow targets the growing market for stationary storage needed to balance intermittent solar and wind generation. The company operates as a DeepTech startup combining expertise in electrochemistry and materials science. Founded in 2022 and headquartered in Milan, Italy, Sinergy Flow has raised approximately $10.1 million at the Seed stage from investors including 360 Capital Partners, CDP Venture Capital, Politecnico di Milano, Tech4Planet, Cassa Depositi e Prestiti Group, Village Capital, and Exergon.